From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D16FA40FD87; Mon, 15 Jun 2026 16:10:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781539842; cv=none; b=K9VGmwXvz5TZsWSE1GzQK8MkC7Z4e3vbJuxdB6DVAZEco+M1uxgsf5LMZSQjhy12IL7H5T+FPSVsrB6xd0BvEk88/zWGCqS21mbSg6iuCz1ovgWTvr/byj9uA3aEVBiuwLHjmC2Gi6D8tQVJcL7bv11maSvo61oRlVf5Q2J5f84= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781539842; c=relaxed/simple; bh=1H9x4pEZJ9qkAPBU2nBzdn+Fy1Js3SiNM+vLUchH+X8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=WV/fNYtspa94g8hemj+tazQYTpP8uKCAhiWkZpTzOG4vSAsNn801TbQam0YT8cQDhIcNvJvNIiGMiNXCQGc0Fy0ghJ32kZPaUxnEM/mStPLfH3aeN3rBJlUrdjOporLDcFtN0L06zYOhCfLZsbaQZ4BaEYHTaiE17/4/pDyAUSU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hRKdXCq/; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="hRKdXCq/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 241071F000E9; Mon, 15 Jun 2026 16:10:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781539841; bh=s2Nu94G1QYwV0Emq9ZE/vR9zmqebZOy/GJaBCjCaRlY=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=hRKdXCq/Di0yDVyM/BFZpVJYk+Eo4IVGGmK6eddql8FPf7QRcGa/NKyve+FzWWm2n nJADHQ8tH3yvoRTcOANZzqjjWF5Y530YCZ5LYQjvz3u2xlCGiREWdeA70FlL5gEn1Q Svf4/E+Q7kC1Ie0zaz5N7hCkhTAMur2BdHw4GGOv6qLkW00aBTzr9VYF5SH8xyP1ud V+xPI13vuxiIZZNAwZG1o2v/AayOoKL2gptSuYRVmPoWHRLgBV+Gky8QdCg55vlxgG PB8jN8K+g+cr0IfwJFCDqygIwgK4O1j3UISteGwd0/qeAPTbN9MmZvOp0HBcbTA+Uo tzspBhR4Uc2ig== From: Vincent Mailhol Date: Mon, 15 Jun 2026 18:09:05 +0200 Subject: [PATCH 09/19] powerpc: define DPS root partition type UUIDs Precedence: bulk X-Mailing-List: linux-efi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260615-discoverable-root_partitions-v1-9-39c78fac42e2@kernel.org> References: <20260615-discoverable-root_partitions-v1-0-39c78fac42e2@kernel.org> In-Reply-To: <20260615-discoverable-root_partitions-v1-0-39c78fac42e2@kernel.org> To: Jens Axboe , Davidlohr Bueso , Alexander Viro , Christian Brauner , Jan Kara Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-efi@vger.kernel.org, linux-fsdevel@vger.kernel.org, Vincent Mailhol , Madhavan Srinivasan , Michael Ellerman , linuxppc-dev@lists.ozlabs.org X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=2097; i=mailhol@kernel.org; h=from:subject:message-id; bh=1H9x4pEZJ9qkAPBU2nBzdn+Fy1Js3SiNM+vLUchH+X8=; b=owGbwMvMwCV2McXO4Xp97WbG02pJDFkGylctNHnUtn/wDAwTbLtt+l0x56bd++Z5sgGO2cJ68 wI2hWd2TGRhEONisBRTZFlWzsmt0FHoHXboryXMHFYmkCHSIg0MQMDCwJebmFdqpGOkZ6ptqGcI ZOgYMXBxCsBUH5vF8IdDcvnNvUHJDBJxkv7/nT87dn5N25FVWr6v4MqhD5vaewQY/md4LHCZUZ1 vNLtYcH9OxvxLB7XWdrQcfNx8+LBMxPSrk1kA X-Developer-Key: i=mailhol@kernel.org; a=openpgp; fpr=ED8F700574E67F20E574E8E2AB5FEB886DBB99C2 DPS [1] assigns GPT partition type UUIDs to operating system partitions. Root partitions use architecture-specific type UUIDs so the OS can discover the intended root filesystem without relying on a root= cmdline option. Define DPS_ROOT_PARTITION_TYPE_UUID in asm/dps_root.h for the powerpc endian and 32/64-bit variants described by the specification and select ARCH_HAS_DPS_ROOT_PARTITION_TYPE_UUID. [1] The Discoverable Partitions Specification (DPS) Link: https://uapi-group.org/specifications/specs/discoverable_partitions_specification/ Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Vincent Mailhol --- arch/powerpc/Kconfig | 1 + arch/powerpc/include/asm/dps_root.h | 16 ++++++++++++++++ 2 files changed, 17 insertions(+) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index e93df95b79e7..e611280a6057 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -134,6 +134,7 @@ config PPC select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_HAS_DMA_MAP_DIRECT if PPC_PSERIES select ARCH_HAS_DMA_OPS if PPC64 + select ARCH_HAS_DPS_ROOT_PARTITION_TYPE_UUID select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_GIGANTIC_PAGE if ARCH_SUPPORTS_HUGETLBFS diff --git a/arch/powerpc/include/asm/dps_root.h b/arch/powerpc/include/asm/dps_root.h new file mode 100644 index 000000000000..6b3592a73d3d --- /dev/null +++ b/arch/powerpc/include/asm/dps_root.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef _ASM_POWERPC_DPS_ROOT_H +#define _ASM_POWERPC_DPS_ROOT_H + +#ifdef CONFIG_PPC64 +#ifdef CONFIG_CPU_LITTLE_ENDIAN +#define DPS_ROOT_PARTITION_TYPE_UUID "c31c45e6-3f39-412e-80fb-4809c4980599" +#else +#define DPS_ROOT_PARTITION_TYPE_UUID "912ade1d-a839-4913-8964-a10eee08fbd2" +#endif +#else +#define DPS_ROOT_PARTITION_TYPE_UUID "1de3f1ef-fa98-47b5-8dcd-4a860a654d78" +#endif + +#endif /* _ASM_POWERPC_DPS_ROOT_H */ -- 2.53.0